The Shadowhunters' Wiki
The Shadowhunters' Wiki

As illustrated in the Shadowhunter's Codex.

Adamas is a heavenly metal found beneath Idris used to make tools for Shadowhunters. They are forged by the Iron Sisters, the only ones capable of handling the material.


The metal is silver-white, translucent, and smooth as glass but warmer and heavier. It is said to glow slightly. It is the hardest substance the Nephilim know of, and can only be manipulated, shaped and carved, by Iron Sisters, who use seraphic Marks unknown to non-Sisters, and forges in the Adamant Citadel that take fire from the heart of a volcano.[1]


Adamas can be crafted into seraph blades, steles, witchlight stones, and even make up the demon towers of Alicante.

According to Sebastian Morgenstern, the Mortal Instruments are also made of adamas. He later used it to create a demonic version of the Mortal Cup, called the Infernal Cup, with the help of Sister Magdalena.[2]

In the past, adamas was used to make aletheia crystals; which were used to store memories.[3]

Black adamas

Black adamas is adamas that has been corrupted by a demon realm and as such is very rare. It's only known use at this time was to make the Svefnthorn Shinyun Jung found for Sammael.[4]


In Ancient Greek, "adamas" (ἀδάμας) is of Semitic origin—it means unconquerable, invincible, untamed, proper, unalterable, and unbreakable. Adamas is also related to the Greek word variant "adamant" and the Latin word "diamant", which translates or refers to the "the hardest metal, diamond".[5][6]


  • Though the touch of adamas is deadly to common demons, Greater Demons are able to resist it—although it is extremely painful to do so. In the case of Fallen Angels, this pain makes them feel a spark of the divinity they once had.[7]